debian6.0下编译slmodem出错

jhy4291

出错信息如下：
localhost:~/Modem-PCI-20110619/slmodem-2.9.11-20110321# make
make -C modem all
make[1]: Entering directory `/root/Modem-PCI-20110619/slmodem-2.9.11-20110321/modem'
gcc -Wall -g -O -I. -DCONFIG_DEBUG_MODEM   -o modem_main.o -c modem_main.c
modem_main.c: In function 'modem_run':
modem_main.c:795: error: 'EINTR' undeclared (first use in this function)
modem_main.c:795: error: (Each undeclared identifier is reported only once
modem_main.c:795: error: for each function it appears in.)
modem_main.c:889: error: 'EAGAIN' undeclared (first use in this function)
modem_main.c:893: error: 'EIO' undeclared (first use in this function)
make[1]: *** [modem_main.o] Error 1
make[1]: Leaving directory `/root/Modem-PCI-20110619/slmodem-2.9.11-20110321/modem'
make: *** [modem] Error 2


请教各位，这是什么原因造成的，谢谢！